Æth-oxy-phenyl-camphoryl imid and process of making same.



properties.

.PATEXT OFFICE.

UXITED STATES ARNOLD H. C. HEITMANX AND ERIK C. CLEMMEXSEX, OF DETROIT,

MICHIGAN, ASSIGNORS TO PARKE, DAVIS & COMPANY, ,OF DE- TROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

ETH-OXY-PHENYL-CAMPHORYL INllD AND PROCESS OF MAKING SAME.

Specification of Letters Patent.

' Patented June 26, 1906.

Application filed August 14.1905. Serial No. 274,158. (Specimens.)

duce temperature.

It is the object of the invention to obtain a compound which has the desired characteristics and is free from some of the detrimental qualities ofproducts heretofore used for this purpose. For example, the compound known .as acetanalid is an antipyretic; butit has poisonous properties, which render its use inurious. Again, certain compounds which have antipyretic properties also have the effect of heart depression, and therefore cannot be safely used in many cases.

It is the essential object of the present in ention to obtain a compound which, on the one hand, is free from poisonous properties, and, on the other hand, slightly increases rather-than decreases vital action, while at the same time it possesses strong antipyretic This object we have attained, first, by selecting two substances, one of. which has the desired antipyret-ic qualities and the other the physiological effect of increasing vital action, and, secondly, by chemically uniting these bodies so as to effect a molecular union. l

The invention therefore consists, first, in a new substance combining in molecular union substances haying, respectively, the desired physiological characteristics; second, in a new class of chemical compounds which fulfil thenecessary conditions; third, in a new specific chemical compound, and, fourth, in the process for manufacturing the same.

The new class of chemical compounds which we have obtained as a part of our invention may be broadly designated as phenyl-camphoryl imids or camphoryl-phenyl amids. The essential chemical characteristic is the presence in molecular union of a phenylradical and a camphoryl radical con- I nected by the imido or the amidio groups and may be generally represented by t e l formula: (can1phorvl) \-X( henylh. These 1 compounds may be forme in various ways. I but we preferably employthe following process and will describe the same as used for i forming the specific product which is teth- Q oxy-phenyl-camphoryl imid and may be considered as a condensation product of amidophenetol and cainphoric acid. The ingredients, preferably camphoric-acid anhydr d and imido-phenetol, are inixed in molecular roportion and subjected to heat, preferably or several hours. be directly combinedybut the reaction is facilitated bythepresence of a solvent of high boiling-point.a s, for instance, xylol. The reas follows:

In the above reaction one molecule of amido-phenetol combines with one molecule of camphoric-acid anhydrid, one of water being spilled off, thus forming one molecule of the desired product-viz, zeth-oxy-phenolcamphoryl imid. To form the pure product, the xylol is distilled off and the residue purified by crystallization from a solvent such as diluted alcoholyiz., one Volume of alcohol and one of water. The yield is nearly theoretical.

As a modification of the process the ingredients may be combined by a suitable condensing agent, such as phosphorous chlorids, fuming sulfuric acid, &c. For example, the camphoric acid and the amido-phenetol may be mixed with phosphorous trichlorid in molecular proportion or preferably with an excess of the phosphorous 'trichlorid, the result of the reaction being the desired product phosphorous acid and hydrochloric-acid gas.

In a further modification of the process the com ound may be obtained by condensing ami o-phenol with camphoric-acid anhydrid ing in alkylating the condensed phenolic In still another modification camphoryl imid may be condensed with phenetol. Ive do not, however, deem this process as direct action which takes place may be represented :T he substances may thus or as desirable as the ones previously described, inasmuch as the camphoryl imid is .not as easily formed as-the amido-phenetol.

water containing alkalies or acids.

In the various processes above given any of the camphoric acids may be used. ,The

molecule may also be variously alkylated, but

preferablyto contain the ox -eth l rou The roduct obtained is Zharalite rized by the fol owing properties: It appears in the form of colorless silky needles, melting at a temperature of 119 centigrade, is odorless,

' tasteless, quite insoluble in cold'water, slightly tions it is not decomposed. It is slightly 'volatile' at higher temperatures.

'In its physiological elfects the new substance possesses the action of an antipyretic 5 radicals, :rately an andan analgesic. So far as we understand the reaction which takes place in the animal system is, first, the gradual disassociation of t e arhido-phenetol and the camphoric-acid cpermitting each to operate sepai ological efl'ect. possesses strongly antipyretrc qualitles,

while the camp'horic acid has the efiect of increasing vital action. The physiological effect is, however, quite different from that which would be produced by a mixture of the camphoric acid and amido-phenetol uncomto produce its characteristic phys- Thus the amido phenetol' bined, and this is probably due to the gradual release of these substances from the combined molecule which prevents a too energetic action of the ami lo-phenetol.

The dose is from 0.5 to one gram per ounce.

What we claim as our invention is 1. The herein-described substance, the same being a condensation product of camphoric acid and amido-phenetol, which is characterized by anti yretic and analgesic properties; in its pure orm it appears in silky needles, melting at a tem erature of 119 centigrade, is colorless, odor ess, tasteless, insolu-- ble in cold water, slightly-soluble in warm water, readily soluble in hot diluted alcohol, and very readily in organic solvents, such as alcohol, ether, chloroform, acetone, benzol, petroleum ether; is insoluble in acid or alkali solutions and is not decomposed therein.

2. The process of forming camphorylalkyl-oxy-phenyl amids, which consists in condensing two substances res ectively containin the camphoryl and the alkyl-oxy pheny radical and one of said substances be- 1ng an 'amin, the condensation being effected by heat and in the presence of a solvent of hi h boiling-point.

%n testimony whereof we affiX our signa tures in presence of two witnesses.

ARNOLD H. C. HEITMANN. ERIK C. CLEMMEN SEN.

Witnesses;

JAMES P. BARRY, AMELIA WILLIAMS. 

